James Gurney

This daily weblog by Dinotopia creator James Gurney is for illustrators, plein-air painters, sketchers, comic artists, animators, art students, and writers. You'll find practical studio tips, insights into the making of the Dinotopia books, and first-hand reports from art schools and museums.

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or by email:gurneyjourney (at) gmail.comSorry, I can't give personal art advice or portfolio reviews. If you can, it's best to ask art questions in the blog comments.

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All images and text are copyright 2015 James Gurney and/or their respective owners. Dinotopia is a registered trademark of James Gurney. For use of text or images in traditional print media or for any commercial licensing rights, please email me for permission.

However, you can quote images or text without asking permission on your educational or non-commercial blog, website, or Facebook page as long as you give me credit and provide a link back. Students and teachers can also quote images or text for their non-commercial school activity. It's also OK to do an artistic copy of my paintings as a study exercise without asking permission.

Yes, I've always thought so, too, but so says the article. Such things as grass/stripes and dappled light/spots always seemed intuitively obvious to me, but presumably the scientist has to make such observations testable and repeatable.

If I may add coyotes to the mix, I love the description of them as "Prairie Ghosts." It is uncanny how they appear, then disappear, then reappear if you see them in higher angled light, and at some distance. Their hair is sufficiently irregular in depth, and that provides for breakup, and they color-match the grass, of course.

But, in angulated light, they are illuminated like a candle.

Yes, go figure a scientist to put into question the grass over stripes theory of the Tiger's camouflage.

Aw, and here I thought it was going to be a discussion on that tricky spiral and s-shape they have going on in the pattern of their spots. I forget about it, set out to paint a spotted cat, and get flummoxed every time.

Physics has had its foundations totally changed in the past 100 years- each new major discovery seem to invalidate the old.The biological sciences tend to be a little bit more 'sure of themselves' which makes me less sure of them - i would be careful about accepting current scientific thought as absolute - and always leave room for doubt.look at the views of dinasaurs 50 years ago - but don't be surprised if, in 50 years, our views look even sillier. Case in point, recently a book came out with an 'evolutionary' explanation why we like certain types of art - we like landscapes, we are told, because the remind us of the african savannah (really, what about mountain ranges, which seem more popular?) in any event, the much vaunted out of africa theory is now being seriously questioned making the whole exercise of that book rather silly. The explanation might be totally unrelated- tiger stripes a genetic defect for gene for sharp teeth rather than pure natural selection, which seems a bit reductionist in itself.

just look at all the arguments back and forth about whether butter is good for you :)

@matthew sNice picture, but I could put a gray squirrel on the sidewalk by central park, and he'd be a perfect match, but it wouldn't prove that's why he got his grey coat. And if it's so great for tall grass, should the tiger's prey have them too?

You're completely right "my pen name", you should never accept scientifc theory as absolute unless it is regarded as such - through repeatable and observable testing. For example the theory of gravity. I've never heard anyone suggest that gravity does not exist, despite it being poorly understood, as we can all observe it at all times.

That is actually the foundation of the scientific method - every theory is criticised and attacked and competed with by every other scientist in order to get the most correct possible theories at all times.

In which context evolution, and the theory of natural selection is the most accurate, elegant, logical and probable explanation we currently have for how extremely complex (and seemingly designed) organisms came to be. Until a better explanation is presented it will generally be accepted as the best explanation we have. But science by it's very nature does not consider any fact incontrovertible, to the contrary science heartily encourages discussion, debate and testing of all ideas.

The general idea of natural selection states that any distinct and remarkable feature of an organism must, or must have at some time, been advantageous to that organism. Or else it must be the side-effect of an advantageous feature / behaviour. Otherwise that particular organism would not have been the one that out-lasted it's competitors. That does not imply that all organimsms must evolve along the same path at all.

Comparing concrete to a squirrel, whose species evolved to be the way it is long before concrete was invented, is not helpful. Evolution generally works extraordinarily slowly compared to the normal human frame of reference.

cavematty - we can observe the condition of gravity - or a tiger's stripes - theorizing about why things are (which involves non-repeatable or non testable events in the past, which by definition, cannot be repeated) is a whole other story. So, yes, we can safely say, yes, what we call a tiger has stripes (we can get into metaphysical discussions about what stripes (or art!) are but the whys become far more grey.

I did not compare the squirrel 'seriously' rather to point out just because something blends into its background doesn't mean the background is the reason it looks that way - who knows - the tiger can have stripes for an entirely different reason, and acquired them in a total different environment but it just turns out that their habitat changed and the stripes are a great asset but not so much for, say the tigers in greener jungles or siberia.

to the contrary science heartily encourages discussion, debate and testing of all ideas. oh yeah, like human biodiversity - completely open topic, no pressure there, just as James Watson.

Just a few years ago, naturalist at the AMNH were shocked to learn that Franz Boas fudged his data (and I am being polite) - the impact of his 'research' will take decades to undo.

pure science is a great myth- scientific journals, universities, etc are ran by humans, and humans are corrupt, idealogical, irrational, emotional, illogical - yes even scientists.

I wonder how the adaptive coloration theory would account for anomalies like the cheetah (savannah environment, but spotted), and the North American whitetail deer (forest environment, but plain brown).